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\[LeftArrowRightArrow]\[LeftCeiling]

LeftBracketingBar

LeftBracketingBar \[LeftBracketingBar]

FilledSmallSquare Alias: AliasIndicatorl|AliasIndicator.

FilledSmallSquare Matchfix operator.

FilledSmallSquare x is by default interpreted as BracketingBar[x].

FilledSmallSquare Used in mathematics to indicate absolute value (Abs), determinant (Det), and other notions of evaluating size or magnitude.

FilledSmallSquare Not the same as \[VerticalBar].

FilledSmallSquare Drawn in monospaced fonts with a small left-pointing tee to indicate direction.

FilledSmallSquare Extensible character.

FilledSmallSquare See The Mathematica Book: Section 3.10.1 and Section 3.10.4.

FilledSmallSquare See also: \[LeftDoubleBracketingBar] , \[LeftTee] .

\[LeftArrowRightArrow]\[LeftCeiling]